﻿/*
    NcFramelessHelper, an easy way to support move/resize on
    frameless toplevel windows.
    Copyright (C) 2011  Nishant Parashar
    Email:- nishcode (at) gmail (dot) com

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
//Version 3.0.0
#ifndef FRAMELESS_HELPER_H
#define FRAMELESS_HELPER_H


#include <QObject>
class FramelessHelperImpl;


#define RESIZE_BORDER_WIDTH 5 // 用于尺寸变形的窗口边框的宽度

/**
 * @brief 用来管理需要无边框特性的窗口
 */
class FramelessHelper : public QObject
{

public:
    explicit FramelessHelper( QObject* parent = 0 );
    ~FramelessHelper();

    void activateOn( QWidget* topLevelWidget );
    void removeFrom( QWidget* topLevelWidget );

    void setWidgetMovable( bool movable );
    bool isWidgetMovable();

    void setWidgetResizable( bool resizable );
    bool isWidgetResizable();

    void useRubberBandOnMove( bool use );
    bool isUsingRubberBandOnMove();

    void useRubberBandOnResize( bool use );
    bool isUsingRubberBandOnResisze();

    //Make sure to leave the same content margins
    //around the widget as the newBorderWidth
    //this can be done by
    //yourWidget->layout()->setMargin( newBorderWidth );
    //otherwise your widget will not expose the
    //area where this class works
    void setBorderWidth( int newBorderWidth );
    int borderWidth();

protected:
    virtual bool eventFilter( QObject* obj, QEvent* event );

private:
    FramelessHelperImpl* m_impl;
};

#endif // FRAMELESS_HELPER_H
